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NDA Math Probability Part 2
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© examsnet.com
Question : 53
Total: 59
A problem is given to three students A ,B and C whose probabilities of solving the problem are
1
2
,
3
4
and
1
4
respectively. What is the probability that the problem will be solved if they all solve the problem independently?
[NDA I 2019]
29
32
27
32
25
32
23
32
Validate
Solution:
(A)
E = event that problem will be solved
∴ P( E) = 1 − P(
E
1
)
= 1 −
(
1
−
1
2
)
(
1
−
3
4
)
(
1
−
1
4
)
= 1−
1
2
×
1
4
×
3
4
=
1
−
3
32
=
29
32
© examsnet.com
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